Geoboard, by The Math Learning Center

The Geoboard is a tool for exploring a variety of mathematical topics introduced in the elementary and middle grades. Learners stretch bands around pegs to form line segments and polygons and make discoveries about perimeter, area, angles, congruence, fractions, and more. This virtual version of the manipulative is an open-ended educational tool, ideal for elementary classrooms and other learning environments. Visit The Math Learning Center for more information about using the Geoboard: www.mathlearningcenter.org/apps.

Screenshots from Chrome Web Store